GEA Aseptomag AV, Translation From The Original Operating Manual

Page: 47 / 72

10.9.2 Fitting the Divisible Valve Seat Seal
Hint!
Pay attention to the following points when assembling the valve seat
seal:
• Thoroughly clean all parts and check for damage.
• Replace all dismantled seals.
•
When changing the seals, do not damage the seal groove.
• Use only replacement seals from the seal set indicated in the list of
spare parts.
! Valve seat seals made of hard sealing materials must not be greased.
! A light film of food-grade lubricant must be applied to elastomer
valve seat seals before fitting.
! Wetting elastomer seals is not permitted when they are used in ATEX
applications!
Tools required:
• Torque wrench with wrench socket
• Vice with smooth jaws or equivalent type of protected jaws
•
Food-grade lubricant PARALIQ GTE 703
Carry out the following steps:
1. The screwed-on valve seat seal is fitted in the reverse order of removal, see
Section 10.9.1, Page 45.
! Prepare thermoplastic valve seat seals, (TEFASEP
®
, PTFE, ...) in the oven
see Section 10.8.2, Page 43.
! Note table “Torques for divisible valve disks”, see Section 10.9.3, Page 47.
®
The valve seat seal has been fitted.
10.9.3 Torques for Divisible Valve discs
Valve size
Thread size of valve
disc
Torque [Nm]
DN10 M6 9
DN15 M6 9
DN25 M8 x 1 20
DN40 M10 x 1.25 50
DN50 M12 x 1.25 60
DN65 M12 x 1.25 60
DN80 M12 x 1.25 60
DN100 M12 x 1.25 60
Maintenance
Removing and Installing the "Divisible System" Valve Seat Seal
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